在JIMWLK高斯近似下氘-金碰撞中的前向双强子关联
Forward dihadron correlations in deuteron-gold collisions with a Gaussian approximation of JIMWLK
摘要：
我们计算了氘-金或质子-金正向碰撞中的双强子关联。利用连续耦合BK方程计算了偶极子截面的能量依赖关系，并利用因子化高斯近似将其推广到更高点的Wilson线偶极子。与以前的一些工作不同，我们在双强子截面中同时考虑了“非弹性”和“弹性”两个因素。我们表明，双重部分子散射的贡献包括在我们的计算，并获得一个远离侧峰，大致同意与实验观测和方位角独立基座的估计。我们发现，非线性效应的动量接近饱和标度是清晰可见的远离侧峰结构。
英文摘要：
We compute dihadron correlations in forward deuteron-gold or proton-gold collisions. The running coupling BK equation is used to calculate the energy dependence of the dipole cross sections and extended to higher point Wilson line correlators using a factorized Gaussian approximation. Unlike some earlier works we include both the "inelastic" and "elastic" contributions to the dihadron cross section. We show that the double parton scattering contribution is included in our calculation and obtain both an away side peak that roughly agrees with experimental observations and an estimate for the azimuthal angle-independent pedestal. We find that nonlinear effects for momenta close to the saturation scale are clearly visible in the away side peak structure.
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